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US 12,661,441 B2Granted
Dialysis catheter including pressure and impedance sensors
AssigneeMozarc Medical US LLC
InventorVenkatesh Manda
Life of this patent
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Abstract
In examples described herein, a catheter configured to deliver dialysate and extract an effluent fluid from a peritoneal cavity of a patient includes at least two sensors configured and positioned to generate respective signals indicative of one or more parameters related to PD treatment provided to the patient. The sensors can include, for example, a pressure sensor configured to generate a pressure signal indicative of a pressure of a fluid within a lumen of the catheter or external to the catheter and an impedance sensor configured to generate an impedance signal indicative of an impedance of a fluid within the lumen of the catheter or external to the catheter. A parameter related to PD treatment can include, for example, a catheter status or a peritoneal cavity status of the patient.
Claims37
A system, comprising:
- a catheter comprising:
- an elongated catheter body defining a lumen and a longitudinal axis;
- a channel extending parallel to the longitudinal axis and formed in a portion of an outer wall of the elongated catheter body,
- wherein at least a portion of the elongated catheter body is disposed between the lumen and the channel;
- and
- a plurality of sensors comprising:
- a pressure sensor configured to generate a pressure signal indicative of a pressure of fluid within the lumen or external to the lumen, and
- an impedance sensor disposed on or in the catheter and configured to generate an impedance signal indicative of an impedance of an electrical path within the lumen or external to the lumen, wherein, when the impedance sensor generates the impedance signal, the impedance sensor is disposed within a patient,
- wherein at least one of the plurality of sensors is disposed within the channel;
- an outer cover configured to partially cover the channel and the elongated catheter body,
- wherein the outer cover includes at least one opening aligned with the at least one of the plurality of sensors disposed within the channel;
- wherein the at least one of the plurality of sensors disposed within the channel is positioned such that the at least one of the plurality of sensors extends beyond an outermost surface of the outer cover;
- and
- processing circuitry configured to:
- receive the pressure signal and the electrical impedance signal;
- adjust a sampling frequency, based on a duration of therapy administered to the patient, of at least one of the plurality of sensors;
- determine a first parameter related to peritoneal dialysis treatment based on the pressure signal and the electrical impedance signal,
- wherein the first parameter includes a volume of the fluid within a peritoneal cavity;
- and
- determine a second parameter related to the peritoneal dialysis treatment based on the electrical impedance signal,
- wherein the second parameter is indicative of a need to remove additional effluent fluid from the peritoneal cavity.
18 more elements
A system, comprising:
- a catheter comprising:
- an elongated catheter body defining a lumen and a channel,
- a pressure sensor configured to generate a pressure signal indicative of a pressure of fluid within the lumen or external to the lumen, and
- an impedance sensor configured to generate an electrical impedance signal indicative of a characteristic of fluid within the lumen or external to the lumen;
- and
- a cover at least partially covering the channel,
- wherein at least one of the pressure sensor or the impedance sensor are positioned in the channel, the cover defining an opening aligned with the at least one of the pressure sensor or the impedance sensor;
- wherein at least one of the pressure sensor or the impedance sensor is positioned within the channel such that the at least one of the pressure sensor or the impedance sensor extends beyond an outermost surface of the cover;
- and
- processing circuitry configured to:
- receive the pressure signal and the electrical impedance signal;
- determine a parameter related to peritoneal dialysis treatment based on the pressure signal and the electrical impedance signal,
- wherein the parameter includes at least one of a patient parameter, a parameter indicative of a catheter patency status, a parameter indicative of a peritoneal cavity status, a parameter indicative of a peritoneal hemodynamic status, or a volume of fluid;
- and
- control an operation of a peritoneal dialysis cycler based on the parameter.
12 more elements
A method comprising:
- receiving, by processing circuitry, a pressure signal from a pressure sensor indicative of a pressure of fluid within a lumen defined by an elongated catheter body of a catheter or external to the lumen,
- receiving, by the processing circuitry, an impedance signal from an impedance sensor indicative of an impedance of an electrical path within the lumen or external to the lumen,
- wherein the impedance sensor is disposed within a channel extending parallel to a longitudinal axis defined by the elongated catheter body and formed in a portion of an outer wall of the elongated catheter body,
- wherein at least a portion of the elongated catheter body is disposed between the lumen and the channel,
- wherein the catheter includes an outer cover configured to partially cover the channel and the elongated catheter body,
- wherein the outer cover includes an opening aligned with the impedance sensor disposed within the channel;
- wherein the impedance sensor disposed within the channel is positioned such that the impedance sensor extends beyond an outermost surface of the outer cover;
- adjusting, by the processing circuitry, a sampling frequency of at least one of the pressure signal, the impedance signal, or any combination thereof, based on a duration of a peritoneal dialysis therapy administered to a patient;
- and
- determining a parameter related to the peritoneal dialysis treatment based on the pressure signal and the impedance signal.
7 more elements
Dependencies are inferred from the claim text.